This seatrain runs 58 km with 80 minutes duration streching from Gangneung to Samcheok with a stop over in Donghae. The seats in the train are setting to face the window so that the passenger can enjoy the outdoor scenery from the train.
Samcheok to Gangneung : Dearture at 08:40 (only open in May and August) / 12:10 / 15:45
Gangneung to Samcheok : Departure at 10:24 / 14:10 / 17:34 (only open in May and August)
I hope this route will be extended until Busan, it would be a great idea ^^